![]() What bone protects delicate organs in our body? Stores minerals: Bones hold your body’s supply of minerals like calcium and vitamin D. Protects and supports organs: Your skull shields your brain, your ribs protect your heart and lungs, and your backbone protects your spine. How do bones protect important organs in our body? 6 Do our bones produce calcium and protect vital organs?.5 What are the bones that protect important organs?.4 What do bones do for organs inside your body?.3 What bone protects the heart from damage?.2 What bone protects delicate organs in our body?.1 How do bones protect important organs in our body?.The reason for that is because a cells plasma membrane is made of phospholipids and so anything that is fat soluble (nonpolar) can still pass through. They prevent most blood-borne toxins from entering the brain but it’s not an absolute barrier because fat soluble molecules can easily pass such as alcohol, nicotine and anesthetics. ![]() The tight junctions literally sew the cell membranes together and don’t allow things to pass through. These flattened out cells called endothelial cells have the least permeable capillaries in the entire body thanks to tight junctions. This is the final layer of protection in the brain. Blood-Brain Barrier protects the brain from within Get acquainted with the flow in the second picture below. When things go in the other direction, ependymal cells absorb waste.Ībout 500ml per day circulates everyday from blood to CSF and then back to blood. Inside it is water, sodium, glucose, oxygen, vitamins, etc. Once the blood plasma goes out, it is called CSF. Blood plasma diffuses out the capillaries and moves into the ependymal cells. Underneath the ependymal cells are capillaries. The cilia from them stick out into the space in the ventricles. The choroid plexuses are composed of ependymal cells and capillaries that are attached to pia mater and create the CSF. Cerebrospinal Fluid (CSF)ĬSF is formed in the choroid plexuses in all the four brain ventricles and they are scattered around. Underneath the occipital lobe is the straight sinus. It separates the cerebellum from the inferior portion of the occipital lobe. The tentorium cerebelli (tent of the cerebellum) lies in the transverse fissure and is a horizontally oriented extension of the dura mater. The superior sagittal sinus is the largest dural sinus and filled with blood.įalx Cerebelli (n ot to be confused with falx cerebri) is a small triangular process of dura mater, received into the posterior cerebellar notch and runs along the vermis (the rounded and elongated central part of the cerebellum, between the two hemispheres.) The falx cerebri is the fusion of the meningeal layers of the dura mater below the superior sagittal sinus. The continuation of the meningeal becomes the falx cerebri pictured above and is found only in the longitudinal fissure. The arachnoid villi (villus for singular) protrude from the arachnoid mater (the thin second layer) and allow CSF to exit the brain and pass into the blood. It literally means “soft mother” as opposed to dura mater which means “durable mother.” Our deepest layer is the pia mater which is a very delicate connective tissue. Deep to the arachnoid mater is the potential subarachnoid space. The space that is firmed is a sinus.ĭeep to the dura mater is the potential subdural space and deep to that is the arachnoid mater and it’s named arachnoid because of its spider-leggy appearance. ![]() See the blue triangle below? The meningeal separates from the periosteal and goes down into the longitudinal fissure. The dura mater is found all around the brain and its 2 layers separate and create spaces called dural sinuses. ![]() ![]() Immediately deep to the periosteum is the periosteal and meningeal which create the dura mater. It encloses and protects the vessels that supply the brain and contains CSF between the pia mater and arachnoid maters. The function of the meninges is to cover and protect the brain itself. In this post we will explore them all in detail, well, except for the skull since that was already discussed in other posts about the bones. The brain is protected from injury by the skull, meninges, cerebrospinal fluid and the blood-brain barrier. ![]()
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